Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Hotrodding Basics> Porting 396 chev oval port heads to rectangular port
User Name
Password
lost password?   |   register now

Thread: Porting 396 chev oval port heads to rectangular port Reply to Thread
Title:
  
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
06-27-2012 12:41 PM
krypty
Quote:
Originally Posted by BOBCRMAN@aol.com
I have a pair of these rect-oval ported heads in my "Do not do" archives. Whenever a customer asks about "converting" a set of oval port heads. I show them. A lot of work for nothing. Th only "port match" is at the gasket surface. There isn't enuff material in the upper port to even come close to a rectangle port match.

The Super Stock drag racers in the seventies used rectangle port intakes on oval port heats on a regular basis. I've built a few street/strip BBC's this way and have seen no ill effects. As stated, Just use the rectangle port gasket.

I beg to differ, I have done a set of Squirvel ports on my dads 496....although you are right not much material on the roof BUT enough to make the top of the port Square and the bottom I left Oval...and it works really to good, as he already damaged the TH400 whitch had all new clutches re-built, and has recently switch to a bulletproof TH350 with a brake...it will be running soon and i will take pics/vid of the car so all might see what the "sqirvel ports" can do with port work
06-03-2012 08:30 AM
martin7844 Hello Fellow hot Rodders. Thanks for your valuable Information. If there is not enough spare metal in the oval port head to "Port out", and If the super stock drag Racers in the 70's ran rect port intakes to their Oval port Heads. Well NO WORRIES!!! I'll but the rect port tunnel ram Intake for my 69 BBC oval port heads. THX again for your help. I'll keep you posted as to how this engine RUNS.Cheers, Marty.
06-03-2012 08:21 AM
BOBCRMAN@aol.com
Quote:
Originally Posted by cobalt327
No need to try to turn the oval ports into rectangular ports- you can't anyway. Just run the intake on the heads, as-is- if you can't get the correct intake to match the heads. There have been reports that this combo works better than you would expect. Use rectangle port gaskets.
I have a pair of these rect-oval ported heads in my "Do not do" archives. Whenever a customer asks about "converting" a set of oval port heads. I show them. A lot of work for nothing. Th only "port match" is at the gasket surface. There isn't enuff material in the upper port to even come close to a rectangle port match.

The Super Stock drag racers in the seventies used rectangle port intakes on oval port heats on a regular basis. I've built a few street/strip BBC's this way and have seen no ill effects. As stated, Just use the rectangle port gasket.
06-03-2012 12:22 AM
cobalt327
Quote:
Originally Posted by martin7844
Hello. Fellow Hot Rodders. I have a 1969 Chev BBC with original Oval Port heads. Can I port-grind out enlarge the oval ports to match a rectangular port tunnel ram Intake, with two 650cfm carbs. I also want to install a Comp Cam 11-213-3 Magnum Hydraulic flat tappet camshaft with .550 " int./ .550 exh. lift, & 292 duration. Will this set up dramatically increase my HP & torgue. THX, Marty.
No need to try to turn the oval ports into rectangular ports- you can't anyway. Just run the intake on the heads, as-is- if you can't get the correct intake to match the heads. There have been reports that this combo works better than you would expect. Use rectangle port gaskets.
06-03-2012 12:00 AM
martin7844
Porting 396 chev oval port heads to rectangular port

Hello. Fellow Hot Rodders. I have a 1969 Chev BBC with original Oval Port heads. Can I port-grind out enlarge the oval ports to match a rectangular port tunnel ram Intake, with two 650cfm carbs. I also want to install a Comp Cam 11-213-3 Magnum Hydraulic flat tappet camshaft with .550 " int./ .550 exh. lift, & 292 duration. Will this set up dramatically increase my HP & torgue. THX, Marty.

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -6. The time now is 09:03 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.